CVE-2005-0786 in SimpGB
Summary
by MITRE
SQL injection vulnerability in gb_new.inc in SimpGB allows remote attackers to execute arbitrary SQL commands via the quote parameter to guestbook.php.
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Analysis
by VulDB Data Team • 11/23/2025
The vulnerability identified as CVE-2005-0786 represents a critical SQL injection flaw within the SimpGB guestbook application, specifically affecting the gb_new.inc component. This vulnerability resides in the guestbook.php script where the quote parameter is processed without adequate input validation or sanitization. The flaw enables remote attackers to inject malicious SQL code directly into the application's database layer, potentially compromising the entire backend system. The vulnerability is classified under CWE-89, which specifically addresses SQL injection weaknesses in software applications. This type of vulnerability falls squarely within the ATT&CK framework's T1190 category, which encompasses exploitation of vulnerabilities in web applications to gain unauthorized access to backend systems.
The technical implementation of this vulnerability occurs when user input from the quote parameter is directly concatenated into SQL query strings without proper escaping or parameterization. Attackers can manipulate the quote parameter to inject malicious SQL syntax that alters the intended query execution flow. When the application processes this input, the injected SQL commands execute with the privileges of the database user account associated with the web application, potentially allowing attackers to extract sensitive data, modify database contents, or even execute system commands on the underlying server. The vulnerability's remote exploitability means that attackers do not require physical access to the system, making it particularly dangerous for publicly accessible web applications.
The operational impact of this vulnerability extends beyond simple data compromise, as it can lead to complete system takeover and persistent access. Successful exploitation allows attackers to bypass authentication mechanisms, escalate privileges, and potentially establish backdoors for continued access. The vulnerability affects organizations running SimpGB versions prior to the patch release, creating a window of opportunity for malicious actors to target guestbook applications that have not been updated. This type of vulnerability is particularly concerning in environments where guestbooks are used for sensitive data collection or where the underlying database contains confidential information. The attack surface is broad since guestbook applications are commonly deployed across various web platforms, making this vulnerability a significant risk for organizations that have not implemented proper input validation controls.
Mitigation strategies for CVE-2005-0786 should focus on immediate patching of the SimpGB application to the latest secure version that addresses the SQL injection vulnerability. Organizations must implement proper input validation and sanitization techniques, ensuring all user-supplied data is properly escaped before being incorporated into database queries. The use of prepared statements or parameterized queries should be mandatory for all database interactions, as this approach prevents SQL injection by separating SQL code from data. Additionally, implementing web application firewalls and intrusion detection systems can provide additional layers of protection against exploitation attempts. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other applications, while network segmentation and access controls can limit the potential damage from successful exploitation attempts. The vulnerability demonstrates the critical importance of secure coding practices and the necessity of following established security frameworks such as the OWASP Top Ten to prevent common web application vulnerabilities.